2+2 =4

Yes. In base-10 arithmetic, 2 + 2 = 4.

If you’re exploring bases:

• In base 5 or higher, 2 + 2 = 4 (digit 4 exists).
• In base 4, 2 + 2 = 10.
• In base 3, 2 + 2 = 11.

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